This Smart Metals sample pack contains labelled samples of all the smart metals for evaluation, supplied in a rigid plastic case.1 x Smart Spring1 x Two-Way Memory Spring1 x Smart Wire 0.006″ diameter (125mm)1 x Memory Metal (125mm)Smart Spring:At room temperature this spring is soft enough to pull out to approximately 50mm by applying a small force.When heated to 70°C by passing an electric current through it (or by other means such as hot water or a heat gun, etc), the spring contracts to its original length with a useful pulling force (equivalent to lifting a 0.5kg weight).Spring weight: 1.1gDimensions: 20mm (when closed), 5.5mm external diameter. 4mm internal diameterTwo Way Memory Spring:These remarkable springs, based on a brass alloy, ‘remember’ to open up when heated and close again when cool.If immersed in hot water at or around 90°C they will open in a split second and close as quickly if dropped in cold water. Such springs have many industrial applications – e.g., in sprinkler and fire damping systems where they replace expensive single-use only fusible links.Spring weight: 3gThe spring is 10mm long, extending to 25mm in hot water.11.5mm external diameter9mm internal diameterSmart Wire:Smart wire is a shape memory alloy (SMA) that changes its length with a useful pulling force when a small current is passed through it. The Smart Wire is activated by passing a small electric current through it. It is also affected by temperature.125mm length0.15mm diameter wire
